Answer:
1. This makes the monster more human, because it shows that like us, it can be touched by art. he has the ability to get involved with music and be moved by this work that touches his heart, showing that he has feelings and reasoning, just like us.
2. The blind person accepts the monster so much because, as he cannot see it, it does not define it in relation to its appearance, but it defines it by what it demonstrates to be through words and the sensitivity with which it speaks. This makes the blind see beyond the appearance of the monster, allows the blind to see who the monster really is.
3. Because the monster found someone who empathizes with him, who is willing to listen to him, to keep in touch and who actually cares for him. The monster never had this experience and it thrills him.